JPH06225231A - On-vehicle display device - Google Patents

Abstract

PURPOSE:To improve real time service required for car navigation by collecting program information of a television character broadcasting in a prescribed amount and immediately displaying it on a display device main body at once. CONSTITUTION:A teletext receiver 10 receiving the teletext and the display device main body 7 which displays program information of the teletext received by the teletext receiver and can navigation information so that they can freely be switched are provided. A program reservation means reserving the program of the teletext, a means storing program information received by the teletext receiver 10 and a display control means storing telext program information reserved by the program reservation means while the display device reservation means 7 displays car navigation information and displaying teletext program information stored by the memory in accordance with manual selection means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted display device having a car navigation function, and more particularly to a vehicle-mounted display device provided with a television teletext receiver.

[0002]

2. Description of the Related Art Conventionally, as an example of a vehicle-mounted display device equipped with this type of car navigation device, a GPS (Global
Some have a GPS receiver that receives navigation radio waves from a plurality of artificial satellites of the Positioning System (Global Positioning System) and detects the current position of the own vehicle (own vehicle position).

Then, the position of this vehicle is superimposed on a map read from a CD-ROM or the like, and an LCD (liquid crystal display device) is displayed.
The information necessary for traveling of the vehicle, such as a guide route from the vehicle position to the destination, is displayed on the display device as car navigation information.

Further, in this type of car navigation system, information relating to sight-seeing in a traveling place is switched from a map display from a CD-ROM and given to a display device main body, a speaker or the like for display, or a music CD is played. be able to.

[0005]

However, a vehicle-mounted display device equipped with such a conventional car navigation device has no means for receiving teletext broadcasts. In other words, there are many programs that provide useful information for car navigation such as programs that provide traffic information in teletext broadcasting, but if these programs are received while the vehicle is running, the reception environment is poor. In this case, a required teletext program cannot be immediately received and displayed, and it takes a considerable amount of time to accumulate a predetermined amount of program information about one television teletext program. There is.

Therefore, the present invention has been made in consideration of such circumstances, and an object thereof is to quickly provide a predetermined amount of program information of teletext of television and improve a real-time service required for car navigation. An object of the present invention is to provide a vehicle-mounted display device.

[0007]

The present invention is configured as follows in order to solve the above-mentioned problems.

The invention according to claim 1 of the present application (hereinafter, referred to as the first
Invention)), a television teletext receiving device for receiving teletext, and a display device main body for switchingably displaying program information and other information of the television teletext received by the teletext receiving device. A program reservation unit for reserving a program of the TV teletext, a unit for storing the program information received by the TV telecast receiving device, and a display unit for displaying the other information when the display device body is displaying the other information. While storing the teletext broadcast program information reserved by the program reservation means by the storage means,
Display control means for displaying the television teletext program information stored by the storage means on the display device body in accordance with a manual selection.

In the invention according to claim 2 of the present application (hereinafter referred to as the second invention), the display control means includes means for detecting an error in the data received by the teletext receiver, and the detection means. Means for not storing the received data in the storage means when an error in the received data is detected by the means.

Furthermore, the invention according to claim 3 of the present application (hereinafter referred to as the third invention) has a car navigation device for providing the car navigation information necessary for traveling of the vehicle as other information to the display device main body. It is characterized by

[0011]

<First Invention> When other information such as car navigation information other than TV teletext program information is being displayed on the display device main body, the TV teletext program information reserved by the program reservation means is It is received by the television teletext receiver and is stored and accumulated in the storage means by the display control means.

After that, when the TV teletext program is manually selected to be displayed from the car navigation information or the like, the TV text broadcast program information accumulated in the storage means by the display control means is displayed on the display device main body. To be done.

Therefore, according to the present invention, it generally takes time to accumulate a predetermined amount of program information about one program of TV teletext, but the accumulation is performed by a display device for displaying other information such as car navigation information. Since this is performed during the display on the main body, when the television teletext is displayed on the display device main body, the accumulated television teletext programs can be displayed at once and the real-time service can be improved.

<Second Invention> When the television teletext is received while the vehicle is traveling, the receiving environment may be poor. However, the error of the data received by the television teletext receiving device is an error detecting means. And the error data is discarded without being stored in the storage means.

Therefore, according to the present invention, the accuracy or precision of the program information of the teletext of television displayed on the display device main body can be improved.

<Third invention> Since either the car navigation information or the program information of the teletext of the television can be selectively displayed on the main body of the display device, the information necessary for the car navigation is the program information of the teletext of the television. The car navigation function can be enhanced by collecting from the car.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the overall construction of an embodiment of the present invention. In the figure, a vehicle-mounted display device 1 is
It is installed in a moving body such as an automobile and has a car navigation function.
GPS receiver 3 which receives navigation radio waves from a plurality of artificial satellites 2 of the tem (global positioning system) to detect the current position of the own vehicle (own vehicle position), a CD-ROM (reading) which stores a lot of map information and the like. A CD-ROM driver 5 that drives a storage medium such as a dedicated compact disk memory 4 to output map information, an input device 6 such as a keyboard or a touch panel, and a CRT (cathode ray tube) or LCD with a speaker 7a. A display device 7 which is a main body of a display device such as a (liquid crystal display device), a CPU (central processing unit) 8a, and an information processing device 8 including a microprocessor having a ROM 8b and a RAM 8c as storage and work areas thereof .

Further, the on-vehicle display device 1 has a TV tuner 9 for receiving a TV teletext and demodulating it into a TV video and an audio signal, and a teletext receiving device 10. The teletext receiving device 10 receives the video signal and the audio signal from the TV tuner 9, extracts the program information of the teletext superposed on these signals, stores the contents in a memory, and outputs the video signal. To the display device 7 and the audio signal to the speaker 7a.
To give to.

On the other hand, the GPS receiving device 3 has a built-in high-precision clock, receives the radio wave transmission time and the orbit information of the earth's orbit from the GPS satellite 2 as navigation radio waves, and receives the received radio wave. By measuring the arrival time with the built-in clock of the GPS receiver 3, the distance between the receivers can be detected. Further, when the distance from one GPS satellite 2 is known, the receiving point, that is, the position of the own vehicle exists on any of the spherical surfaces centering on the GPS satellite.

Therefore, by receiving similar information from, for example, four GPS satellites 2, the intersection of each spherical surface can be set as the reception position, that is, the own vehicle position, and the current position is detected by three-dimensional coordinates. be able to. The most important feature of this navigation is that it can detect the current position of the vehicle anywhere in the world.

Further, the GPS receiving device 3 is provided for each GPS satellite 2
By measuring the Doppler frequency of the radio wave from
It is possible to calculate the change in the position of the PS satellite 2 and the own vehicle, that is, the moving speed and direction of the own vehicle.

The input device 6 operates to provide map information stored in the CD-ROM 4, change the receiving channel of the TV tuner 9, and reserve the change of the collected and stored programs of the teletext receiving device 10.

By the way, the teletext (text multiplex) received by the teletext receiving device 10 is an information transmission system which broadcasts by utilizing the gap between television radio waves like the voice multiplex broadcasting. The content is an image composed of characters and figures and music information called additional sound, and FIG. 2 shows a television signal TVs on which the character signal a is superimposed. In this system, a character signal a is transmitted by superimposing it on each H (horizontal scanning period) within VBL (vertical blanking period) of a video signal that does not appear on the television screen. In principle, 10th (273) H to 21st
(284) It is possible to superimpose the character signal a in each horizontal scanning period of H, ensuring compatibility without causing interference in the video and audio of the television receiver, and superimposing the signal for operating the broadcasting station. The 14th (277) H to 16th (279) H and 21st (284) H are currently allocated, excluding the period during which the current period is set.

Although there are various programs for each of these teletext programs, as shown in FIG. 3, for example, the first page of the information of these programs is transmitted in sequence for every program, and hereafter, page 2 and thereafter. Information is sequentially transmitted for every program and one program information is transmitted, and since there are about 100 programs in one broadcasting station, it takes a considerable time to collect them as one program information. Each program has a number for each program. For example, NHK traffic information is # 601 to # 603.
Reserve a program number and store received data in memory. The program reservation means and the memory are provided in the teletext receiver 10.

Then, the information processing device 8 reads out the vehicle position information from the GPS receiving device 3 while reading out the map information from the CD-ROM 4 through the CD-ROM driver 5 and superimposing the own vehicle position on the map. Display on the display device 7 and control the receiving channel of the TV tuner 9,
It controls the teletext receiving device 10, selects a video signal to be output to the display device 7, selects an audio signal to be output to the speaker 7a, and has a display control means and a received data error detection means.

When the car navigation information is being displayed on the display device 7, the display control means displays the teletext receiving device 1.
While the teletext program information reserved by the program reservation means No. 0 is stored and stored in the memory, the teletext program information stored in the memory is displayed on the display device 7 in accordance with the manual selection.

The received data error detecting means detects an error in the data received by the teletext receiver 10 and does not store the received data in the teletext reception memory when the error in the received data is detected. It will be discarded.

FIG. 4 shows a reserved program automatic reception program for teletext of television, which is a part of the function of the display control means, which will be described below. In addition, in FIG. 4, S1 to S10
Shows each step of the flowchart.

First, in S1, the information processing device 8 waits until the input device 6 manually selects a display other than television broadcast and text broadcast. When this selection is input, an automatic reception start instruction is given to the teletext receiving device 10 in S1,
The automatic reception mode is started in S2.

At the next step S3, it is judged whether or not there is an input for changing the television channel.
At 4, the channel of the TV tuner 9 is changed according to the instruction. However, when there is no TV channel change instruction in S3 or after S4, the process proceeds to S5, where it is determined whether or not the received data has an error. This is the C of the received data
An error in the received data is determined by detecting the I (control signal) discontinuity index, and the error data is discarded in S6.

That is, in order to perform mobile reception, the time during which the TV radio wave reception environment is good is not continuous but intermittent. Therefore, only the program data having no reception error is updated for each program data, and the program in which an error has occurred is controlled not to be updated, thereby increasing the amount of information to be provided and improving accuracy.

Then, only the error-free information is stored in S7, and it is checked in S8 whether or not the information collection / storage of the program is completed. If the display is manually selected, an instruction to end the automatic reception is given to the teletext receiver 10, and the check is performed in S9. If there is no end instruction, the reception of the next reserved program is started in S10,
Until the end instruction is given, the process returns to S3 and repeats the processes from S3.

Next, the operation of this embodiment will be described.

The user switches the display device 7 to the menu screen for teletext reservation by using the input device 6 and displays it before starting the driving of the vehicle to start moving. The teletext programs required here are registered in advance and reserved. This reservation is reserved and registered by the program reservation means in the teletext receiver 10.

Next, the user starts driving while switching to display normal navigation information on the display device 7, for example.

Then, the information processing device 8 reads the vehicle position data from the GPS receiving device 3 and operates the CD-ROM driver 5 based on the vehicle position data to drive the map including the vehicle position from the CD-ROM 4. Is read out and the position of the vehicle is superimposed on this map and output to the display device 7 for display. At this time, the information processing device 8 provides the user with the navigation of the map by scrolling the map on the map screen as the traveling progresses. On the other hand, the demodulation output of the television broadcast and the text broadcast is displayed on the display screen. Since it is not necessary to output, the channels of the TV tuner 9 are freely switched one after another, and the telecast receiver 10 collects information on reserved programs.

While the vehicle is traveling, when the user wants to obtain traffic congestion or regulation information at the destination, for example, the input device 6 is used to manually switch to the teletext display. Then, so far collected /
The television information broadcast traffic information program or the like that has been stored and prepared is immediately displayed on the display device 7.

Therefore, according to this embodiment, the program information of the TV character broadcast is received and stored while the car navigation information other than the TV character broadcast is displayed on the display device. When a manual selection is made to switch to a broadcast program, the stored and accumulated program information of TV teletext can be collectively displayed on the display device 7 in a form of a predetermined amount. The required real-time service can be improved. Further, when an error is detected in the received data of the teletext of the television, the incorrect data is not displayed on the display device 7, so that the accuracy of the information of the teletext program can be improved.

Furthermore, since the car navigation information and the TV teletext program information can be appropriately selected and displayed on the display device 7, the display device 7 displays information such as a traffic information providing program among the TV teletext programs. , The car navigation function can be further enhanced.

[0041]

As described above, the first invention of the present application is
While other information such as car navigation information is being displayed on the display device main body, the information of the TV teletext program is stored in the memory means in memory so that the display main body is switched to the display of the TV teletext program. In this case, the information of the teletext program accumulated in the memory can be displayed immediately at once, so that the real-time service required for car navigation can be improved.

Further, in the second aspect of the present invention, when an error in the data received by the teletext receiver is detected, the received data is not stored in the storage means, so that the incorrect data is displayed on the display device main body. It is possible to prevent this from occurring, and it is possible to improve the accuracy of the information displayed on the display device body.

Further, according to the third invention of the present application, the car navigation information and the program information of the teletext of the television can be displayed on the display device body in a freely switchable manner, so that the amount of information provided to the user can be increased. You can

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of an in-vehicle display device including the first to third inventions of the present application.

2 is a waveform diagram showing a configuration of a television signal on which teletext program information received by the teletext receiving device shown in FIG. 1 is superimposed.

FIG. 3 is a diagram showing a part of a teletext program received by the teletext receiving device shown in FIG. 1;

FIG. 4 is a flowchart of a reserved program automatic reception program built in a ROM of the information processing apparatus shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 In-vehicle display device 2 GPS artificial satellite 3 GPS receiving device 4 CD-ROM 5 CD-ROM driver 6 Input device 7 Display device 7a Speaker 8 Information processing device 9 TV tuner 10 Text broadcasting receiving device

Claims (3)

[Claims] 1. A television teletext receiving device for receiving teletext, and a display device main body for switchingably displaying program information and other information of the television teletext received by the teletext receiving device. Program reservation means for reserving the program of the teletext, and means for storing the program information received by the teletext receiving device;
While the display device body is displaying the other information, the TV teletext program information reserved by the program reservation unit is stored in the storage unit, and the TV teletext program stored in the storage unit is stored. An in-vehicle display device, comprising: a display control unit for displaying information on the display device body in accordance with manual selection. 2. The display control means detects an error in the data received by the teletext receiver, and the display control means, when the error in the received data is detected by the detecting means,
The vehicle-mounted display device according to claim 1, further comprising: a unit that does not store the received data in a storage unit. 3. A car navigation device for providing car navigation information required for traveling of a vehicle as other information to a display device main body.
Alternatively, the vehicle-mounted display device according to item 2.